How Long Does Composite Decking Last?

Composite decking is made from recycled wood fibers and plastics, creating a durability that resists warping, splintering, rotting, and staining.

I tell customers that composite decks last 25 years or longer when properly installed and regularly cleaned.

Let’s look at composite decking and how you can get the most from your investment.

How Long Does Composite Decking Last?

Composite decking lasts between 25 and 50 years. In essence, you can watch a child grow up and graduate from college, and then a grandchild do the same, with all of those life celebrations happening on the same beautiful deck.

You can’t, however, just set it and forget it and expect this to be your outcome.

I always advise that the lifespan and enjoyment of decks start with selecting the right materials, proper installation, and regular upkeep.

Composite deck boards come with a warranty for their performance and longevity. Depending on the product, warranties can be for 25, 35, or 50 years. Traditional wood decks typically show their age in 10 years based on the type of wood used, weather conditions, and regular maintenance.

How Composite Decks Overcome the Common Lifespan Challenges of Wooden Decks

If you are ready to replace a deck or build a new one, composite decking might be your best option as it provides a longer lifespan than wooden decks. If you find a builder with expertise in composite deck building and choose high-quality materials, you’ll be off to a great start.

Material Composition

Using 95 percent recycled plastics and wood fibers, composite decking materials are more resistant to moisture, rot, and insect damage when compared to natural wood and pressure-treated lumber.

I’ve seen this resistance increase over the years with the addition of capped composite decking. When deck boards are capped in a plastic shield, they are more durable and longer lasting. New generation product lines are more likely capped than first generation.

Resistance to Weathering

The plastic components inside composite decking help prevent the fading, cracking, and splitting that can occur with wood due to UV rays and moisture absorption. Composite decks are designed to withstand prolonged exposure to sunlight, rain, snow, and fluctuating temperatures without significant degradation.

Structural Integrity

Composite deck boards maintain their structural integrity thanks to their engineering and material composition. I know that homeowners who choose composite materials are looking for products that are less prone to warping, twisting, or splintering. A slightly higher price point at purchase and installation for composite creates savings later in maintenance, repair, and replacement.

Maintenance Tips to Extend Lifespan

Today’s composite deck product lines are made to withstand the elements that Mother Nature and a rambunctious family can throw at them. However, homeowners still must do their part to ensure maximum protection and long-lasting beauty.

I recommend the following for regular maintenance.

Regular Cleaning

Since outdoor living spaces are an extension of your home, add deck cleaning into the regular rotation of cleaning the inside of your home. Weekly, or at least once a month, sweep off the deck boards and structure, removing debris, dirt, and cobwebs. Not only does this keep your deck fresh and clean, but it also gives you the chance to quickly notice potential issues, such as an overlooked spill or a bee’s nest in the making. And while you’re at it, you can give the deck furnishings a quick once-over!

Periodic Washing

With all homeowners, I encourage at least two deck washings a year – spring and fall. You can use a pressure washer on composite decking, but you have to be careful, and I tend to tell people to avoid it. You can easily mop up using a soft-bristle brush or sponge, warm water, and mild soap. You can also purchase composite deck cleaning solutions at your local hardware or home improvement store. If you have a raised deck, be sure to clean under your deck as well. To make the cleaning easier, remove deck furniture and décor and be careful when walking on wet surfaces.

Address Spills Promptly

Even though composite decking is resistant to staining, you should promptly wipe up or mop up spills. Depending on the type of spill, it could attract insects or cause someone to slip and fall. Most spills can be easily removed with a mild soap – such as your dish detergent – and warm water with a sponge. If you have a grill on your deck, place a mat under your grill to catch drippings or grease. And just like you would inside, clean pet mishaps quickly, too!

Clear Drainage Systems

In my years in the decking industry, I’ve seen one of the biggest culprits to the life and integrity of a decking system is moisture. Proper installation and proper maintenance are your best safeguards. As you perform regular cleaning, look for places where water may collect and check on the gutters and downspouts around your deck. Remove leaves and debris and flush out with your garden hose. Clean, clear, and proper drainage is essential to keeping your deck secure and dry.

Trim Nearby Vegetation

I love a beautifully landscaped yard with vibrant, healthy shrubs, trees, and flowers. I also love the look and feel of potted plants and living walls on a deck. But we don’t want any of these causing potential issues. Vegetation allows leaves and debris to collect on your deck boards and may draw additional moisture and pests. Keep vegetation trimmed back from your deck (and home), and keep the areas around your pots and living wall clean.

Winter Care

Composite decking is made to withstand summer rays and frigid temperatures, but extra care may be needed during winter. If your climate is one of snow and ice, I suggest sweeping, shoveling, or leaf-blowing the deck clear after winter storms pass. When using a shovel (plastic only), be careful not to scrap it against the deck boards. Try not to allow the snow and ice to sit too long and melt on its own. Not only does this retain moisture, but it also creates the potential for slipping and falling. You can use ice melt on composite decking, but look at the product information and follow the instructions carefully.

Composite decking is made to last. In fact, the lifespan of composite decking can’t be beat! With the right installation, proper maintenance and upkeep, and high-quality materials, you will have a long-lasting deck to enjoy in your outdoor space for decades to come.